Enum rustc_middle::thir::ExprKind

source ·

pub enum ExprKind<'tcx> {
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        region_scope: Scope,
        lint_level: LintLevel,
        value: ExprId,
    },
    Box {
        value: ExprId,
    },
    If {
        if_then_scope: Scope,
        cond: ExprId,
        then: ExprId,
        else_opt: Option<ExprId>,
    },
    Call {
        ty: Ty<'tcx>,
        fun: ExprId,
        args: Box<[ExprId]>,
        from_hir_call: bool,
        fn_span: Span,
    },
    Deref {
        arg: ExprId,
    },
    Binary {
        op: BinOp,
        lhs: ExprId,
        rhs: ExprId,
    },
    LogicalOp {
        op: LogicalOp,
        lhs: ExprId,
        rhs: ExprId,
    },
    Unary {
        op: UnOp,
        arg: ExprId,
    },
    Cast {
        source: ExprId,
    },
    Use {
        source: ExprId,
    },
    NeverToAny {
        source: ExprId,
    },
    Pointer {
        cast: PointerCast,
        source: ExprId,
    },
    Loop {
        body: ExprId,
    },
    Let {
        expr: ExprId,
        pat: Box<Pat<'tcx>>,
    },
    Match {
        scrutinee: ExprId,
        arms: Box<[ArmId]>,
    },
    Block {
        block: BlockId,
    },
    Assign {
        lhs: ExprId,
        rhs: ExprId,
    },
    AssignOp {
        op: BinOp,
        lhs: ExprId,
        rhs: ExprId,
    },
    Field {
        lhs: ExprId,
        variant_index: VariantIdx,
        name: Field,
    },
    Index {
        lhs: ExprId,
        index: ExprId,
    },
    VarRef {
        id: LocalVarId,
    },
    UpvarRef {
        closure_def_id: DefId,
        var_hir_id: LocalVarId,
    },
    Borrow {
        borrow_kind: BorrowKind,
        arg: ExprId,
    },
    AddressOf {
        mutability: Mutability,
        arg: ExprId,
    },
    Break {
        label: Scope,
        value: Option<ExprId>,
    },
    Continue {
        label: Scope,
    },
    Return {
        value: Option<ExprId>,
    },
    ConstBlock {
        did: DefId,
        substs: SubstsRef<'tcx>,
    },
    Repeat {
        value: ExprId,
        count: Const<'tcx>,
    },
    Array {
        fields: Box<[ExprId]>,
    },
    Tuple {
        fields: Box<[ExprId]>,
    },
    Adt(Box<AdtExpr<'tcx>>),
    PlaceTypeAscription {
        source: ExprId,
        user_ty: Option<Box<CanonicalUserType<'tcx>>>,
    },
    ValueTypeAscription {
        source: ExprId,
        user_ty: Option<Box<CanonicalUserType<'tcx>>>,
    },
    Closure(Box<ClosureExpr<'tcx>>),
    Literal {
        lit: &'tcx Lit,
        neg: bool,
    },
    NonHirLiteral {
        lit: ScalarInt,
        user_ty: Option<Box<CanonicalUserType<'tcx>>>,
    },
    ZstLiteral {
        user_ty: Option<Box<CanonicalUserType<'tcx>>>,
    },
    NamedConst {
        def_id: DefId,
        substs: SubstsRef<'tcx>,
        user_ty: Option<Box<CanonicalUserType<'tcx>>>,
    },
    ConstParam {
        param: ParamConst,
        def_id: DefId,
    },
    StaticRef {
        alloc_id: AllocId,
        ty: Ty<'tcx>,
        def_id: DefId,
    },
    InlineAsm(Box<InlineAsmExpr<'tcx>>),
    ThreadLocalRef(DefId),
    Yield {
        value: ExprId,
    },
}

Variants

`Scope`

Fields

region_scope: Scope

lint_level: LintLevel

value: ExprId

Scopes are used to explicitly mark destruction scopes, and to track the HirId of the expressions within the scope.

`Box`

Fields

value: ExprId

A box <value> expression.

`If`

Fields

if_then_scope: Scope

cond: ExprId

then: ExprId

else_opt: Option<ExprId>

An if expression.

`Call`

Fields

ty: Ty<'tcx>

The type of the function. This is often a FnDef or a FnPtr.

fun: ExprId

The function itself.

args: Box<[ExprId]>

The arguments passed to the function.

Note: in some cases (like calling a closure), the function call f(...args) gets rewritten as a call to a function trait method (e.g. FnOnce::call_once(f, (...args))).

from_hir_call: bool

Whether this is from an overloaded operator rather than a function call from HIR. true for overloaded function call.

fn_span: Span

The span of the function, without the dot and receiver (e.g. foo(a, b) in x.foo(a, b)).

A function call. Method calls and overloaded operators are converted to plain function calls.

`Deref`

Fields

arg: ExprId

A non-overloaded dereference.

`Binary`

Fields

op: BinOp

lhs: ExprId

rhs: ExprId

A non-overloaded binary operation.

`LogicalOp`

Fields

op: LogicalOp

lhs: ExprId

rhs: ExprId

A logical operation. This is distinct from BinaryOp because the operands need to be lazily evaluated.

`Unary`

Fields

op: UnOp

arg: ExprId

A non-overloaded unary operation. Note that here the deref (*) operator is represented by ExprKind::Deref.

`Cast`

Fields

source: ExprId

A cast: <source> as <type>. The type we cast to is the type of the parent expression.

`Use`

Fields

source: ExprId

`NeverToAny`

Fields

source: ExprId

A coercion from ! to any type.

`Pointer`

Fields

cast: PointerCast

source: ExprId

A pointer cast. More information can be found in PointerCast.

`Loop`

Fields

body: ExprId

A loop expression.

`Let`

Fields

expr: ExprId

pat: Box<Pat<'tcx>>

`Match`

Fields

scrutinee: ExprId

arms: Box<[ArmId]>

A match expression.

`Block`

Fields

block: BlockId

A block.

`Assign`

Fields

lhs: ExprId

rhs: ExprId

An assignment: lhs = rhs.

`AssignOp`

Fields

op: BinOp

lhs: ExprId

rhs: ExprId

A non-overloaded operation assignment, e.g. lhs += rhs.

`Field`

Fields

lhs: ExprId

variant_index: VariantIdx

Variant containing the field.

name: Field

This can be a named (.foo) or unnamed (.0) field.

Access to a field of a struct, a tuple, an union, or an enum.

`Index`

Fields

lhs: ExprId

index: ExprId

A non-overloaded indexing operation.

`VarRef`

Fields

id: LocalVarId

A local variable.

`UpvarRef`

Fields

closure_def_id: DefId

DefId of the closure/generator

var_hir_id: LocalVarId

HirId of the root variable

Used to represent upvars mentioned in a closure/generator

`Borrow`

Fields

borrow_kind: BorrowKind

arg: ExprId

A borrow, e.g. &arg.

`AddressOf`

Fields

mutability: Mutability

arg: ExprId

A &raw [const|mut] $place_expr raw borrow resulting in type *[const|mut] T.

`Break`

Fields

label: Scope

value: Option<ExprId>

A break expression.

`Continue`

Fields

label: Scope

A continue expression.

`Return`

Fields

value: Option<ExprId>

A return expression.

`ConstBlock`

Fields

did: DefId

substs: SubstsRef<'tcx>

An inline const block, e.g. const {}.

`Repeat`

Fields

value: ExprId

count: Const<'tcx>

An array literal constructed from one repeated element, e.g. [1; 5].

`Array`

Fields

fields: Box<[ExprId]>

An array, e.g. [a, b, c, d].

`Tuple`

Fields

fields: Box<[ExprId]>

A tuple, e.g. (a, b, c, d).

`Adt(Box<AdtExpr<'tcx>>)`

An ADT constructor, e.g. Foo {x: 1, y: 2}.

`PlaceTypeAscription`

Fields

source: ExprId

user_ty: Option<Box<CanonicalUserType<'tcx>>>

Type that the user gave to this expression

A type ascription on a place.

`ValueTypeAscription`

Fields

source: ExprId

user_ty: Option<Box<CanonicalUserType<'tcx>>>

Type that the user gave to this expression

A type ascription on a value, e.g. 42: i32.

`Closure(Box<ClosureExpr<'tcx>>)`

A closure definition.

`Literal`

Fields

lit: &'tcx Lit

neg: bool

A literal.

`NonHirLiteral`

Fields

lit: ScalarInt

user_ty: Option<Box<CanonicalUserType<'tcx>>>

For literals that don’t correspond to anything in the HIR

`ZstLiteral`

Fields

user_ty: Option<Box<CanonicalUserType<'tcx>>>

A literal of a ZST type.

`NamedConst`

Fields

def_id: DefId

substs: SubstsRef<'tcx>

user_ty: Option<Box<CanonicalUserType<'tcx>>>

Associated constants and named constants

`ConstParam`

Fields

param: ParamConst

def_id: DefId

`StaticRef`

Fields

alloc_id: AllocId

ty: Ty<'tcx>

def_id: DefId

A literal containing the address of a static.

This is only distinguished from Literal so that we can register some info for diagnostics.

`InlineAsm(Box<InlineAsmExpr<'tcx>>)`

Inline assembly, i.e. asm!().

`ThreadLocalRef(DefId)`

An expression taking a reference to a thread local.

`Yield`

Fields

value: ExprId

A yield expression.

Trait Implementations

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impl<'tcx> Clone for ExprKind<'tcx>

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fn clone(&self) -> ExprKind<'tcx>

Returns a copy of the value. Read more

1.0.0 · source

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more

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impl<'tcx> Debug for ExprKind<'tcx>

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more

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impl<'tcx, 'ctx> HashStable<StableHashingContext<'ctx>> for ExprKind<'tcx>

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fn hash_stable(
 &self,
 hcx: &mut StableHashingContext<'ctx>,
 __hasher: &mut StableHasher
)

Auto Trait Implementations

impl<'tcx> !RefUnwindSafe for ExprKind<'tcx>

impl<'tcx> !Send for ExprKind<'tcx>

impl<'tcx> !Sync for ExprKind<'tcx>

impl<'tcx> Unpin for ExprKind<'tcx>

impl<'tcx> !UnwindSafe for ExprKind<'tcx>

Blanket Implementations

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impl<T> Any for Twhere
T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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impl<T> Borrow<T> for Twhere
T: ?Sized,

const: unstable · source

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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impl<T> BorrowMut<T> for Twhere
T: ?Sized,

const: unstable · source

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

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impl<Ctxt, T> DepNodeParams<Ctxt> for Twhere
Ctxt: DepContext,
T: for<'a> HashStable<StableHashingContext<'a>> + Debug,

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default fn fingerprint_style() -> FingerprintStyle

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default fn to_fingerprint(&self, tcx: Ctxt) -> Fingerprint

This method turns the parameters of a DepNodeConstructor into an opaque Fingerprint to be used in DepNode. Not all DepNodeParams support being turned into a Fingerprint (they don’t need to if the corresponding DepNode is anonymous). Read more

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default fn to_debug_str(&self, Ctxt) -> String

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default fn recover(Ctxt, &DepNode<<Ctxt as DepContext>::DepKind>) -> Option<T>

This method tries to recover the query key from the given DepNode, something which is needed when forcing DepNodes during red-green evaluation. The query system will only call this method if fingerprint_style() is not FingerprintStyle::Opaque. It is always valid to return None here, in which case incremental compilation will treat the query as having changed instead of forcing it. Read more

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impl<T> From<T> for T

const: unstable · source

fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, R> InternIteratorElement<T, R> for T

type Output = R

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fn intern_with<I, F>(iter: I, f: F) -> <T as InternIteratorElement<T, R>>::Outputwhere
I: Iterator<Item = T>,
F: FnOnce(&[T]) -> R,

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impl<T, U> Into for Twhere
U: From<T>,

const: unstable · source

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> MaybeResult<T> for T

impl<T> ToOwned for Twhere
T: Clone,

type Owned = T

The resulting type after obtaining ownership.

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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more

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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more

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impl<T, U> TryFrom for Twhere
U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

fn try_from(value: U) -> Result<T, <T as TryFrom>::Error>

Performs the conversion.

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impl<T, U> TryInto for Twhere
U: TryFrom<T>,

type Error = >::Error

The type returned in the event of a conversion error.

const: unstable · source

fn try_into(self) -> Result<U, >::Error>

Performs the conversion.

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impl<CTX, T> Value<CTX> for Twhere
CTX: DepContext,

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default fn from_cycle_error(tcx: CTX) -> T

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impl<'a, T> Captures<'a> for Twhere
T: ?Sized,

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference’s “Type Layout” chapter for details on type layout guarantees.

Size: 40 bytes

Size for each variant:

Scope: 23 bytes
Box: 7 bytes
If: 23 bytes
Call: 39 bytes
Deref: 7 bytes
Binary: 11 bytes
LogicalOp: 11 bytes
Unary: 7 bytes
Cast: 7 bytes
Use: 7 bytes
NeverToAny: 7 bytes
Pointer: 7 bytes
Loop: 7 bytes
Let: 15 bytes
Match: 23 bytes
Block: 7 bytes
Assign: 11 bytes
AssignOp: 11 bytes
Field: 15 bytes
Index: 11 bytes
VarRef: 11 bytes
UpvarRef: 19 bytes
Borrow: 7 bytes
AddressOf: 7 bytes
Break: 15 bytes
Continue: 11 bytes
Return: 7 bytes
ConstBlock: 23 bytes
Repeat: 15 bytes
Array: 23 bytes
Tuple: 23 bytes
Adt: 15 bytes
PlaceTypeAscription: 15 bytes
ValueTypeAscription: 15 bytes
Closure: 15 bytes
Literal: 15 bytes
NonHirLiteral: 31 bytes
ZstLiteral: 15 bytes
NamedConst: 31 bytes
ConstParam: 19 bytes
StaticRef: 31 bytes
InlineAsm: 15 bytes
ThreadLocalRef: 11 bytes
Yield: 7 bytes